DISCUS – The Deep Interior Scanning CubeSat mission to a rubble pile near-Earth asteroid
| Autor: | Mika Takala, Manfred Wittig, Esa Vilenius, Patrick Bambach, Harald Lentz, Jakob Deller, Hans Martin Braun, Sampsa Pursiainen |
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| Rok vydání: | 2018 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences FOS: Physical sciences Aerospace Engineering engineering.material 01 natural sciences law.invention Conceptual design law 0103 physical sciences CubeSat Altimeter Aerospace engineering Radar 010303 astronomy & astrophysics 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Near-Earth object business.industry Rubble Astronomy and Astrophysics Bistatic radar Geophysics Space and Planetary Science Asteroid engineering General Earth and Planetary Sciences business Geology Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Advances in Space Research. 62:3357-3368 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/j.asr.2018.06.016 |
| Popis: | We have performed an initial stage conceptual design study for the Deep Interior Scanning CubeSat (DISCUS), a tandem 6U CubeSat carrying a bistatic radar as main payload. DISCUS will be operated either as an independent mission or accompanying a larger one. It is designed to determine the internal macroporosity of a 260-600 m diameter Near Earth Asteroid (NEA) from a few kilometers distance. The main goal will be to achieve a global penetration with a low-frequency signal as well as to analyze the scattering strength for various different penetration depths and measurement positions. Moreover, the measurements will be inverted through a computed radar tomography (CRT) approach. The scientific data provided by DISCUS would bring more knowledge of the internal configuration of rubble pile asteroids and their collisional evolution in the Solar System. It would also advance the design of future asteroid deflection concepts. We aim at a single-unit (1U) radar design equipped with a half-wavelength dipole antenna. The radar will utilize a stepped-frequency modulation technique the baseline of which was developed for ESA's technology projects GINGER and PIRA. The radar measurements will be used for CRT and shape reconstruction. The CubeSat will also be equipped with an optical camera system and laser altimeter to sup- port navigation and shape reconstruction. We provide the details of the measurement methods to be applied along with the requirements derived of the known characteristics of rubble pile asteroids. Submitted to Advances in Space Research |
| Databáze: | OpenAIRE |
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